Wheeled scraper



Oct.23, 1945. R s HOAR 2,387,263

WHEELiID, SCRAPER Filed July 11, 1941 5 Sheets-Sheet l INE R.

ATTOREQYS Oct. 23, 1945. R. s. HOAR 2,387,263

' WHEELED SCRAPER Filed July 11, 1941 d v 5 Sheets-Sheet 2 INVENTOR.

1- l m ATTORNEYS Oct. 23, 1945. R. s. HOAR,

- WHEELED SCRAPER Filed July 11, 1941 5 Sheets-Sheet 3 INVEN'DOR BY ion/w ATTORNEYS Oct.23, 1945. R, S, HOAR 2,387,263

WHEELED SGRAPER Filed July 11, 1941 5 Sheets-Sheet 4 IN VEN TOR. .fizmwa/n Z004.

BY QQMTW ATTORNEY! R. S. HOAR V WHEELED- SCRAPER Oct. 23, 1945.

Filed July 11, 1941 5 Sheets-Sheet 5 ATTORNEY 5.

Patented Oct. 23, 1945 UNITED STATES WHEELED sonarnn Roger Sherman Hoar, South Milwaukee, Wis., assignor to Bucyrus-Erie Company, South Milwaukee, Wis., a corporation of Delaware Application July 11, 1941, Serial No. 401,939

6 Claims.

My invention relates to new and useful improvements in wheeled scrapers of the general type shown and described in U. 8. Patent No. 2,152,899, granted April 4, 1939, to Earl B. Maloon,

to which patent reference is hereby made, inasmuch as this present invention represents an improvement thereon.

In scrapers of that type, the bowl fills and dumps at its front end. v

The main frame of such a scraper is pivoted at either its front end or rear end to a wheeled truck, and the digging and spreading depth is determined b'y raising or lowering the other end with respect to a second truck. This is the first operating function.

In Maloon and in all but one of the variants of this present inventiqmthe pivoting is at the front end, and the raising and lowering takes place at the rear end; but this, although very advantageous, is not essential--witness the variant of Figures 12, 13 and 14 hereof.

The digging blade" is carried rigid with the main frame, though this is not essential.

Adjacent the digging blade is pivoted a dirtextruding curved member, variously termed. For conformity with the nomenclature of the Maloon patent, it will here be called a bowl. Swinging this howl upward to dump is the second function.

Returning it to load-carrying position is the third function.

' There is also a front closure, known as the apron. Opening this apron (when digging or dumping), and closing it again for carrying, is the fourth function.

Maloon has two controls (ropes), one of which performs the first function (namely depth-con trol), and the other of which successively performs the fourth function (apron opening) and the second function (dumping).

' bowl, main frame and apron, whereby either the forward motion of the bowl to dump, or the lowering of the digging edge, will perform the fourth function (apron opening).

A further object of my present invention is to utilize this same interlock to perform the third ing position, but for simplicity with the omission function (bowl return), thus constituting an improvement over the apparently somewhat similar bowl return means of the co-pending application of Trevor 0. Davidson and'myself, filed November 9, 1940, Serial No. 364,980 and since issued as Patent No. 2,304,076.

In addition to my principal objects, above stated, I have worked out a number of novel and useful details, which will be readily evident asthe description progresses.

My invention consists in the novel parts and in the combination and arrangement thereof sheaves not involved in the interlock which controls the opening Figures 6 and 7 are respectively side elevations of two further variants of my invention, in carryof all ropes and sheaves not involved in the interlock which controls the apron opening. 9

Figures 8, 9 and 10 are side elevations of a fourth form of my scraper, in digg n carrying,

and dumping positions respectively. Incidentally a fifth variant is shown therein:

Figure 11 is a plan view of this variant.

Figures 12, 13 and 14 are side elevations of a sixth form of my scraper, in digging. carrying, and dumping positions respectively.

Referring now to Figures '1 to' 5, we see that the implement to which I have applied my invention, includes a forward truck 2 I and a rear truck 22, supported respectively on two forward wheels 23, and four rear wheels 24. The forward truck- 21! is rigidly secured to two side plate 25, preferably having substantially the outline indicated in Figures 1 to 4. Rigidly secured to the side plates 25, I provide a. transverse lower beam 30, and an upper beam 3!, which latter beam may if desired be made of lighterv construction than the lower beam. Projecting rearwardly from beams 30 and 3| are sheave-supporting brackets 80.

These parts constitute parts of the frame of as shown in Figures 2 and 3,

the implement, and-in accordance with the invention they are connected together in such a way as to enable the shoe 26, which is located forward of the bowl 21, to be raised or lowered at will with respect to the ground level. In order to accomplish this, the rear truck 22 is preferably provided with rigid forwardly projecting side arms 28 that extend forwardly to a point about mid-way betweenthe two trucks, at which point the arms 28 are connected by pivot pins 29 to the side plates 25.

The shoe 26 is preferably rigidly secured at its ends to the side plates 25, and preferably includes an inclined blade 32 that cuts into the earth when the bowl 21 is being filled Adjacent the shoe and preferably at its rear edge, ,the bowl 21 is pivotally mounted on a transverse pivot bar 33. I v

The rear end of the bottom plate 34 of the bowl 21 is preferably bent upwardly to form an integral dished rear head 35 for the bowl.

already mentioned 'copending application of Trevor 0. Davidson and myself.

Having now completed the discussion of the variant of my invention exemplified by Figures 1 to 5 hereof, let us proceed to discuss the two variants of Figures'fi and 7 respectively. In these two variants; allelements not hereinafter mntioned as different, are identical to the corre- When the bowl 21 is in the position of rest as indicated inFisures 1 and 2, the stop bracket 36, carried by the rear end of the bowl, rests against a. bumper block 10 on-the upper side of the lower beam 30, and this limits the downward movement of the rear end of the bowl.

To match. someof the dirt during digging, to

hold the dirt in the-bowl 21 andbetween the side plates 25 during carrying, and to assist in the discharge of thedirt during dumping, I employ an apron 31, piv ota-lly supported on plates 25 by will now? be described',-still with reference to Figures 1 to 4. 4 v

Rope 40 controls the first ly depth-controlf shown, preferably mounted on the tractor which listed function, namepulls myscraper) under one of fairlead sheaves.

4|, over one, offfairlead-sheaves '42, over one of sheaves "43,. and several times around sheaves 44 on the rear truck-22, and, sheaves45 on the brackets 30. 'I'hence it passes to an anchorage 46 adjacent either sheaves 44 or sheaves 45; as shown, it is adjacent the latter. Drawing-in on this rope .40 draws sheaves 44 and 45 together,

and back;to an anchorage 49 adjacentsheaves thus raising the ries' a sheave 60. chorage 6| on rear truck 22,

sponding elements of my already-described variant, and so need not again be discussed. Ropes 40 and 41 and their associated sheaves are (as in Figure 5) omitted from Figures 6 and 7, for the sake of clarity in showing the reevingof the interlock rope.

In the device of Figure 6, rope 54- takes the place of, and performs the functions of, rope 5|! of my first variant. Arms 28, now renumbered as 28', are extended forward, and each carries a sheave 55. Rope 54 passes, from an anchorage 56- adjacentsheaves 43, around sheave 55, thence around one of sheaves 43, thence around a sheave 51 on the apron 31, thence around another of sheaves 43, thencejaround a sheave 58 mounted on brackets 80, and thence to anchorage 53 on bowl 21. In the device of Figure 7, rope 58 takes the place of and performs the functions of rope 50 4 4 of my first variant- Each arm of apron 31, now It passes, from'a winch (not renumbered as 31, extends rearwardly, and car- Rope 59 passes, from an anaround one-of sheaves 62 on the bottom rear of one of side plates 25, thence around sheave B0, thence around another of sheaves 62, thence around sheave 63 on the top rear of side plate 25, and thence to anchorage 53 on bowl 21.

'Let us now consider the fourth variant of my invention, namely, the device of All prior described variants have involved the Figures 8 to 11.

following principle; One rope has controlled the raising and lowering of the digging edge; another "rope has controlled the dumping; and an inter- 43. Drawing-in. on this rope 41 draws sheaves 43 and 48 together, thus tilting the bowl 21 from its carrying position as shown in-Figures 1 and 2,

to its dumping position as shown in Figure 3.

Rope 50 controls the fourth listed function,

namely apron opening. It passes, from an anchorage 5| on the apron 31,.over a grooved direction-changing cam 52 on said apron, thence over one of the sheaves 43, thence around one of sheavesf44, one of sheaves 45, and one of sheaves,4 to an. anchorage 53 on the rear top of the bowl 21. The result of this reeving is that whenever the diggingv blade 32 is lowered (thus widening the gap between sheaves 44 and 45), or wheneverithe, bowl 21 'is tilted forward to dump (thus'widening the gap. between sheaves 44 and =anchorage 53) the tension thus imparted to rope shown in Figure l in the first instance,- and a 50 will raise the apron 31, 'a small amount as) inafter mentioned as different, are identical to apron-opening. shown, preferably mounted locking rope has been provided, to raise the apron whenever either the digging edge is lowered or the dumping is effected. v

' But in this present variant, although (as. n the other variants) one rope controlsthe raising and lowering of the diggingedge, and another rope controls the dumping, and the interlock raises the apron whenever the digging edge is lowered; yet (here being the difference). the other opening of the apron is effected, not bythe dumping, but rather by further pull on the diggingedge-raising rope after the digging edge has been raised to its full extent.

In this present variant, all elements not herethe corresponding elements of my first-described variant, and so need not again be discussed.

In this present variant, rope 64 takes the. place of rope 40. .Its primary function is to eifectdepthcontrol, but (as already stated above) it has in this. variant the further function of effecting 'It passes, from a winch (not on thetractor which pulls my scraper),.runderyoneqof ithe iairlead sheaves 4I,ove'r one of fairleadssheaves fl, over one of sheaves '43, and -several'itimes: around sheaves Mon the reartruck" '22, and sheaves '45 on brackets 80. Thence itypasses :throughxhook 65 on brackets 80, and thence over sheave -6B=on the rear truck 22, thence .over -oneof sheaves 43, and thence, to an anchorage Bl-on apron 31. 7

On rope 65, abutting hookiili, is-a stop liB.

Paying out .rope $4 from *its winchp rmits the side-plates 25, andhenoeithe .blade32gto-lower for digging,.as shown in'Figurfi. As'jthislower- I Having now described; and illustrated six forms -of- -my-invention, I-wish it :to' be understood that my invention is :not to be limited to the specific form or; arrangement ofparts herein described and shown.

I I. claim:

. 1. In a scraper,-having:- groundrsupport; a :main' frame, supported, thereby in. such (manner astobe raisable and lowerable-with respect to the ground; a :digging; ,blade, ficarriedx by: themain wframe'; a dumping and dirteholding bowl, pivoted to; thesmain frame adjacent :the'. blade a front apron, pivotallysupported by the mainframe, and

1. :adapted when lowered; tog-retaindirt within the bowl; and means to raise. the. main frame and Lthereby'the blade; the combinationtherewithv of:

interlocking rope means, operatively connecting the aprontothe-main frame,to oneof the ground ri pp crts and tozthe bowl,- in sucha way that r I whenevereitherthe'main frame is,lowered,or.the 1 bowlis moved to dump,this motion will'raise'the apron;-"a'nd thatpa reach:of=,thisrope extends 31 to open again for dumping, as shown in Fige ure 10. I

I have also shown in Figures 8 to 11 an alterna tive interlock,.to take the place of book .65 and stop 68. If this substitution-be made, we shall have a fifth variant. Or,if desired, b'othforms of interlock can befused simultaneously, to reinforce each other, as shown. Rope 6 1 wil1-;ef

fect apron opening. for dumping, in identically the manner described above andshown in Figure 10. But apron opening for. digging willbe-efiectedas follows: Arms 28, nQW-renumbered -IS, are -ex-.

tended forward. 'Also we provide auxiliary arms 69, pivoted coaxially with apron 31,.which carries stops l0, engageable with said auxiliary arms. Rope H passes from an anchorage on one of .arms

one of arms 69, and 'thus' serves to raisethe apron 31, as shown inFigure 8, whenever. arms 28" swing down coincident withloweringthe'digging edge 32.

Let us now consider thezsixth variant ormy This present variant is similar to my first variant, namely, that of Figures 1 to i, except that in this present variant the main bowl pivots about the rear wheels rather than.v about the front wheels.

Side plates 25' are built integral with rear truck 22. Arms 12 extendrearwardly from front truck 2|, to pivots 13 on the side plates.

Rope I4 performs the functions of rope '40 of the first variant. It passes, from a winch (not shown, preferably mounted on the tractor which pulls my scraper) under one fof. the fairlead sheaves M, over one ofthe fairlead sheaves 42, several times around sheaves 43 ,onthe fro-nt'truck 2| and sheaves 15 at the front end of side plates to an anchorage.

Rope 16 performs the functions ofrope 5010f the first variant. It passesfrom an anchorage St on the apron 31 over a grooved direction-changing cam 52 on said apron, thence. over one of sheaves 43, thence around one of sheaves 15, back over one of sheaves 43, ovensheave 46 to an anchorage 11 on therear of bowl 27.

But note that anchorage 11in Figures l2tol4 is positioned lower than anchorage 53 in Figures 1 to 3. This lowerpositioning enables rope I6 to perform the additional function 'ofinitiating the dumping action of bowl 21.

Rope 41 and its associated sheaves and anchorages, remains unchanged.

rearwardly from the bowl-tosome other-portion of the 'scraperwith respect ltoxwhich other part'the bowl is relatively movable during dumping, thus tending to initiate-the return of the bowl from I dumping position to dirt-holding position, this preachbeing applied to the bowl at such a' point and 'atus'uch .an angleas to havea tendency, when the bowl is in dirt-holding position, to-assist rather'than opposethe dumping mea'ns. g, 2. :In a: scrapen'having: a front ground sup,

- port; azrear ground support; a main frame piv- 1 otally supportedby the'front ground support in H 28", over one of sheaves 43,.to an anchorageon 40 such manner as to be raisable and lowerable with 'respectto the; ground; a digging-blade, carried .by the main frame; a dumping and dirt-holding element, pivoted to the main frame; a front 7 apron, pivotallysupportedby the mainframe, and

adapted, when lowered, to retain dirt within the dirt-holdingv element; a first rope, operatlvely connecting therear support to the main frame, to raise the main frame and thereby the blade; at

invention,.namely, the device ofFigures' 12sto 14.

second rope, operatively-connecting' the main frame and' the. dumping element, to move this element to dump; and an interlocking rope,-operatively connecting the apron, the main frame,'the

-rear support, and the dumping element, in such a way that the lengthening of areach of this interlocking rope between the main frameand the rear support will raise the apron, and that the lengthening-0f. a reach of thisinterlocking rope between the dumping element; and one ofthe other elements will raise the apron.

l 3.: :In. a scrapen-havingr a front ground sup- ;port; a rear ground support; a main frame pivotally supported by the front groundsupport in 'such'manner as to be-raisable, and lowerable with respect tothe' ground; a digging blade carried by the main frame; a dumping and dirt-holding element, pivoted to themain frame; a front apron, pivotally' supported by the main frame, and

a adapted, when lowered, to-retain dirt within the dirt-holding element; a first rope, operatively connecting the rear support to the main frame, to i raise the main frame and thereby the blade; 2.

' secondrope, operatively connecting the main frame and the dumping element, to move this element to dump; and an interlocklngrope, operatively connecting'the apron, the main frame, and

:the rear support, in such a way that the lengthening of: areach of this interlocking rope between .ithe main frame and the rear support will raise the apron. v

4; In a scraper, having: a front groundsuping element, pivoted to the main frame; a front apron, pivotally supported by the. main frame,

and adapted, when lowered, to retain dirt within the dirt-holding element; a first rope, operatively connecting the rear support, the main frame, and

the apron, in such a way that drawing-in of this rope will raise themain frame, and that paying out this rope will permit gravity to lower the main frame, and that, after the main frame has been raised to its utmost, further drawing-in on this rope will raise the apron; a second rope, operatively connecting the main frame and the dumping element, to move this element to dump; and an interlocking rope,- operatively connecting the apron, the main frame, and the rear support, in such a way that the lengthening of a reach of this interlocking rope between the main frame and the rear support will raise the apron.

5. In a scraper, having: a front ground support; a rear ground support; a main frame pivotally supported by the front ground support in such manner asto be raisable and lowerable with respect to the ground; a digging blade carried by the main frame; a dumping and dirtholding element, pivoted to the main frame; a front apron, pivotally supported by .the main frame, and adapted, when lowered, to retain dirt within the dirt-holding element; a first rope, operatively connecting the rear support, the main frame, and the apron, in such a way that drawdrawing-in on this rope will raise the apron; a

second rope, operatively connecting the main frame and the dumping element, to move this element to dump;and an interlocking means, operatively connecting the apron, the main frame, and the rear support, in such a way that the lowering of the main frame will raise the apron.

6. In a scraper, having: a front ground support; a rear ground support; a main frame pivotally supported by the front ground supp rt in such manner as to,be raisable and lowerable with respect to the ground; a digging blade carried by the main frame; a dumping and dirtholding element, pivoted to the mainframe; a front apron, pivotally supported by the main frame. and adapted, when lowered, to retain dirt within the dirt-holding element; a first rope, 0peratively connecting the rear support to the main frame, to raise the main frame and thereby the blade; 9. second rope, operatively connecting the main frame and the dumping element, to move this element to dump; an interlocking rope, operatlvely connecting the apron, the main frame, the rear support, and the dumping element, in

' such a way that the lengthening of a reach of 

